Emily Sun first became well-known as an anxious teenage violinist in the hit Australian documentary Mrs Carey’s Concert.

She was 16 when acclaimed music teacher Karen Carey inspired, cajoled and disciplined 1200 girls from MLC, Burwood during 18 turbulent months of preparation for a concert at the Sydney Opera House.

Ten years on, Sun is returning to the Opera House as one of three finalists competing to be named ABC Young Performer of the Year tomorrow night.

“Everyone in Australia remembers me as the troubled teenager then there was this transformative concerto performance,” she said. “I’m just really grateful that I get to come back 10 years later – I’ve grown up – and everyone can see this journey I’ve made in music.”

Sun, who has been playing violin since the age of four, has returned from studying at the Royal College of Music in London – and performing as a guest soloist with orchestras in the US, Europe and Asia – to her family home at Concord West.

She is up against Oliver Shermacher, a 23-year-old clarinetist from Marrickville, and Kevin Chow, a 21-year-old pianist from Perth, in the country’s most prestigious multi-instrumental competition for young classical musicians, with first prize worth $80,000.

Shermacher is living inspiration for anyone who learned recorder at school. His musical education began with that humble instrument.

“My kindergarten teacher thought that was something we should all be doing,” he said. “I always loved it then changed to clarinet when I was 10 because it looked the most like a recorder.”

His advice for anyone starting out on recorder? “Stick with it,” he said.

Chow, who started playing at the age of five and practises for up to five hours a day, was a late inclusion in the semi-final after violinist Anna Da Silva Chen broke her wrist when she fell while jogging.